Description

C.I. Acid Yellow 119 is a synthetic monoazo acid dye widely recognized for its bright, greenish-yellow hue and excellent fastness properties. This high-performance dye is valued for its strong affinity to protein fibers like wool, silk, and nylon, delivering vibrant and durable coloration. It is a critical component for manufacturers in the textile, leather, and paper industries seeking reliable and consistent yellow shades. The compound is identified by CAS No. 12220-76-7.

Application

• Textile Dyeing: Primary application for dyeing wool, silk, and nylon fibers, offering good leveling and wash fastness.
• Leather Finishing: Used for coloring leather goods, providing rich and uniform yellow tones.
• Paper Coloration: Employed in the production of specialty papers, decorative papers, and security papers.
• Ink Formulation: A component in the manufacture of inks for various printing applications.
• Biological Staining: Potential use as a stain in microscopy and histology for contrast enhancement.
• Industrial Coatings: Incorporated into coatings and paints where a stable yellow pigment is required.

Basic Information

Product Name	C.I. Acid Yellow 119
CAS No.	12220-76-7
Molecular Formula	C16H12N4Na2O7S2
Molecular Weight	510.40 g/mol
Synonyms	Acid Yellow 119; C.I. 19100; Acid Leather Yellow G; Naphthalene Yellow G; Acid Fast Yellow G; Wool Yellow G; Lissamine Yellow G; Acid Yellow G
EINECS	Contact for details

Quality Control

Our C.I. Acid Yellow 119 is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance. Each lot is tested against key parameters including color strength, shade, solubility, and impurity profile to meet industry specifications. Certificates of Analysis (COA) documenting purity, physical properties, and performance characteristics are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents. The product is light-sensitive (store away from light).

Specification

Item	Specification
Appearance	Yellow to orange powder
Identification (IR)	Conforms to standard
Color Strength	100 ± 3% (vs. Standard)
Shade	Conforms to standard
Moisture Content	≤ 5.0%
Water Insoluble Matter	≤ 1.0%
Solubility in Water	Conforms
Fastness Properties	To be specified per grade

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.